Effective enhanced photocatalytic H₂O₂ production through synergistic oxygen vacancy defects and In situ-growth Z-scheme BiOBr/WO₃ heterojunction with compact interface

Rational heterojunction interface construction and defect engineering have been regarded as significant strategies to enhance the photocatalytic performance of hydrogen peroxide (H2O2) production. Herein, a novel 2D/1D BiOBr/WO3 Z-scheme heterostructure with compact interface and rich oxygen vacancies (OVs) was successfully fabricated by an in situ-growth procedure. The rational design architecture and electronic structure allow the photocatalytic system to fully optimize light absorption, charge separation, and surface redox reaction. Benefited from synergistic effect of the formation of compact Z-scheme heterostructur and oxygen vacancies, the as-prepared BiOBr/WO3 photocatalysts exhibit a greatly improved photocatalytic performance in the production of H2O2 with a yield of 82.4 mM/h/g. We believe that this work provides a novel sight to develop high-efficiency photocatalyst via microstructure nanointerface control and defect engineering.